138715627 has 4 divisors (see below), whose sum is σ = 142464736. Its totient is φ = 134966520.

The previous prime is 138715609. The next prime is 138715639. The reversal of 138715627 is 726517831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138715627 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138715627.

It is not an unprimeable number, because it can be changed into a prime (138715657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1874499 + ... + 1874572.

It is an arithmetic number, because the mean of its divisors is an integer number (35616184).

Almost surely, 2^138715627 is an apocalyptic number.

138715627 is a deficient number, since it is larger than the sum of its proper divisors (3749109).

138715627 is an equidigital number, since it uses as much as digits as its factorization.

138715627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3749108.

The product of its digits is 70560, while the sum is 40.

The square root of 138715627 is about 11777.7598464224. The cubic root of 138715627 is about 517.6566487272.

The spelling of 138715627 in words is "one hundred thirty-eight million, seven hundred fifteen thousand, six hundred twenty-seven".